EP1129256B1 - Bridge bearing - Google Patents

Abstract

A bridge bearing in which a substructure and a superstructure are displaceably connected to each other by means of a sliding bearing, whereby the displacement occurs in a linear and/or cardanic manner in at least one of the directions X, Y, and Z. The bearing is characterized in that a carriage (7) that is connected to a cover plate (10) is guided in a linear manner in the X and/or Y direction by two interspaced shafts (5, 4), respectively, on which displaceable slide bushings (9, 8) are arranged and/or the cover plate can be guided in a tiltable manner by a pivot bearing (18) in the Z direction. This combination of a linear and pivot bearing enables all alignment errors arising as a result of finishing inaccuracies, foundation subsidence, desired and undesirable slanting to be compensated and regulates the variations in lengths due to temperature and load.

Description

The invention relates to a bridge bearing, with a substructure and a superstructure sliding are interconnected, whereby in an imaginary three-dimensional coordinate system, the superstructure in at least one the horizontal directions X, Y can be moved and tilted about the vertical Z.

Background of the Invention

Such bridge bearings, which in turn on abutments or pillars rest, transfer the load from the superstructure to the substructure, the Superstructure moves in the longitudinal and / or transverse direction. To accommodate However, such bearings must also be combined with a tilting part become.

Such a generic bridge bearing can be found in the brochure "Innovation in Stahl, No.AG 01 D-3000-12.97 from Maurer Söhne. It exists from a base plate on which a first intermediate plate displaceable in the X direction is arranged, which in turn is a second displaceable in the Y direction Intermediate plate carries. This second intermediate plate has a curved one Recess in which a spherical section made accordingly is inserted. This generic bridge bearing is then covered by a cover plate shot down the linear movements in the direction of the two axes X and Y can perform and which can pivot about the Z axis.

Such a bridge bearing has relatively large dimensions and is on the other hand in its adjustability with respect to the X, Y and Z axes relatively inaccurate. Another disadvantage is its insufficient freedom of play.

Summary of the invention

The object of the invention is therefore, while avoiding the previous disadvantages to develop an improved bridge warehouse.

According to the invention, this task is performed according to the characterizing part of Claim 1 solved.

The decisive advantage of this storage is its clear structure with regard to the function of the three axes of movement. The sliding bushes guarantee absolute freedom from maintenance at the lowest level of friction. Matched load Bearing elements such as plain bearings and spherical bearings reduce the overall weight of the bearing construction and require little installation space. The rounds or spherical bearing elements are self-centering, which is high accuracy and allows good lateral stability. The invention A combination of linear and spherical bearings enables all to be balanced Alignment errors from manufacturing inaccuracies, foundations, deliberate and unwanted misalignments and leads the thermal and stress-related Length changes with good damping capacity.

According to a further feature of the invention according to claim 2, that the bushings are maintenance-free cylindrical PTFE-based bushings are.

These dry sliding bearings known to the person skilled in the art consist of a cylindrical one Steel support body and the maintenance-free sliding layer. The steel body protects against damage during handling and installation. The sliding layer usually consists of a 0.5 mm thick PTFE fabric, is in Resin embedded and firmly anchored on the support body. The flow behavior the sliding layer is also in connection with the support body maximum load almost negligible. The adhesive bond is moisture-stable and swell-free.

From claim 3 it is apparent that the Y-waves in the wave holder means Retaining caps are attached, which are arranged with one in the end faces of the Y-shafts Fixing screw pressed against the shaft holder from the outside are. This is a simple and safe fixation of the Y-waves given.

According to a further feature of the invention according to claim 4, that the X-waves each have an arcuate at their opposite ends Have bulge, in which the Y-waves with a part of their peripheral surface plunge. This has the advantage that the bulge in the position fixing of the X-waves by the Y-waves is given in an elegant way is.

A particularly advantageous form of storage according to the invention is claimed 5 described. Thereafter it is provided that the base plate in its Middle part has a protruding projection protruding towards the cover plate, which is touched by the underside of the slide when loaded.

This has the advantage that the application of force to the bearing does not have the X and Y-waves, but directly on the base plate, so that a whole particularly stable embodiment of the storage is given.

According to claim 6, the X and / or Y waves in the direction of the cover plate have a deflection. This causes such designed Shafts have a certain spring action, so that the bearing is preloaded is.

A further, particularly advantageous embodiment of the invention is claimed 7 described. Then the sled should have one in its middle section have a paragraph provided through hole into which a second Spherical bearing is used, which is inserted into the cover plate using a locking screw is held, a in the region of a pin of the carriage Gap formed between the locking screw and the through hole is. It is advantageous that when the forces change to the negative Area of the Z-axis cannot lift the cover plate, d. that is, it is an anti-lift device educated. In this case it is necessary according to claim 8 that both spherical bearings have a common ball center.

As is apparent from claim 9, the spherical plain bearings can be maintenance-free Axial spherical plain bearings, radial spherical plain bearings or angular spherical plain bearings based on PTFE be trained. These spherical plain bearings are units consisting of Shaft and housing washers and maintenance-free sliding layers in the housing washers. The wave washer has a spherical outer slide, while the housing disc with a hollow spherical inner slide and with a glued-in Is provided sliding layer. Such spherical bearings are then used when, for example, high loads are transmitted with small movements.

In claim 10 is a further advantageous embodiment of an X, Z bearing described. This is characterized by the fact that a base plate two protruding shaft holders spaced apart in the X direction in which two spaced-apart X-waves are held those sliding bushings connected to the slide and displaceable in the linear direction are arranged and the slide is a curved wave washer has, which is received in an associated recess of the cover plate is so that it can be tilted in the Z direction.

The associated counterpart, namely a Y, Z bearing goes from claim 11 out. Then a base plate should protrude two from each other in the Y direction have spaced shaft holders in which two of each other spaced Y-waves are held, on which are connected to the carriage, sliding bushes are arranged in the linear direction and the carriage has a curved wave washer, which in an associated Recess of the cover plate is added so that it is in the Z direction is tiltable.

The invention is explained in more detail using the following exemplary embodiments.

Brief description of the drawings

Figur 1

eine perspektivische Ansicht eines erfindungsgemäßen X-, Y-, Z-Lagers,

Figur 2

eine Vorderansicht dieses Lagers,

Figur 3

eine Seitenansicht dieses Lagers, teilweise geschnitten,

Figur 4

eine Schnittdarstellung entlang der Linie A-A in Figur 3,

Figur 5

eine Schittdarstellung entlang der Linie B-B in Figur 3,

Figur 6

eine perspektivische Darstellung eines erfindungsgemäßen X-, Z-Lagers,

Figur 7

eine perspektivische Darstellung eines erfindungsgemäßen Y-, Z-Lagers,

Fig. 8 - 12

eine perspektivische Darstellung eines erfindungsgemäßen X-, Y-, Z-Lagers in fortschreitenden Aufbaustufen.

Show it:

Figure 1

a perspective view of an X, Y, Z bearing according to the invention,

Figure 2

a front view of this camp,

Figure 3

a side view of this camp, partially cut,

Figure 4

3 shows a sectional illustration along the line AA in FIG. 3,

Figure 5

3 shows a sectional illustration along the line BB in FIG. 3,

Figure 6

2 shows a perspective illustration of an X, Z bearing according to the invention,

Figure 7

a perspective view of a Y, Z bearing according to the invention,

Figures 8-12

a perspective view of an X, Y, Z bearing according to the invention in progressive stages.

Detailed description of the drawings

The invention shown in Figures 1 to 5 and designated 1 X, Y, Z bearing consists of a provided with mounting holes 21 Base plate 2, on which four spaced apart in the X and Y directions, protruding shaft holder 3 are arranged. in these pairwise wave stops 3 two Y-shafts 4 are housed, their fixing by retaining caps 11 takes place, the upper screwed into the Y-shafts 4 12 are pressed from the outside against the shaft holder 3. In the Y direction is between two shaft holders 3 each, a further shaft holder 6 is arranged, wherein the two shaft holders 6 are mutually spaced by two X-shafts 5 are connected. The crossing of both waves 4, 5 is by an opposite one Bulging of the X-shaft 5 enables. On the X waves 5 a slide 7 is guided over slide bushes 9, which with a slot with long holes 22 provided cover plate 10 is connected. This carriage 7 is in the X direction by the amount a from a neutral position both to the right and can also be moved to the left, as shown in FIG. 3. The X-waves 5 in turn are in the Y direction, as shown in Figure 4, by the amount b from a neutral position can also be moved both to the right and to the left. The Displacement in the Y direction takes place by means of the shaft holder 6 via whose sliding bushings 8.

As can be seen from Figure 5, the carriage 7 is in its middle part with a Through hole 14 equipped. It is because of their unmarked paragraph a spherical bearing 15, which with a in the through hole 16 of the base plate 2 screwed locking screw 17 is held. A pin 23 of the carriage 7 surrounds a shaft washer 19 of a spherical bearing 18, wherein the wave washer 18 is received by a recess 20 in the cover plate 10 is. In this way, an anti-lift device is formed, which is a lift-off device the cover plate 10 prevented from the carriage 7. A pivoting of the Cover plate 10 with existing anti-lift device is only possible as far as it is the air gap between the shaft of the locking screw 17 and the through hole 14 in the region of the pin 23 of the carriage 7.

As Figure 1 and Figure 5 further show, the base plate 2 with one in the direction Cover plate 10 facing carrying projection 13 so that between Carriage 7 and carrying projection 13 no gap occurs, d. H. the application of force takes place directly on the base plate 2. In this case, the bottom is useful of the carriage 7 to be provided with a corresponding sliding layer. If the carrying projection 13 is missing, there is a slot between the base plate 2 and Carriage 7 formed so that the force is applied to the base plate 2 on the X waves 5 and Y waves 4 takes place.

The X, Z bearing shown in perspective in FIG. 6 is like already expressed by the name, linear in the direction of the X axis slidable and tiltable about the Z-axis. As a result, in contrast to X, Y, Z bearings described above, the Y-shafts 4 unnecessary. Otherwise the bearing structure is basically the same. This camp points out also no liability guarantee, so that the spherical bearing 15 is dispensed with can be.

In Figure 7, a Y, Z bearing is also shown in perspective. The Structure is analogous to the X, Y, Z bearing described in Figures 1 to 5, the X-waves 5 being dispensed with because of the two degrees of freedom.

In Figures 8 to 12, an X, Y, Z bearing is shown in perspective shown in progressive construction. As can be seen from Figure 8, the Base plate 2 is provided with mounting holes 21 for fixing serve as a connecting structure. Protrude from the base plate 2 with through holes provided shaft holder 3 out. In the middle part of the base plate 2, the carrying projection 13 is visible. As can be seen in FIG. 9, in the mounting holes of the shaft holder 3 Y-shafts 4 recorded which two sliding bushes 8 are arranged. Under the Y waves 4 lie two X-shafts 5, which are curved in the area of the sliding bushes 8 Recess are provided so that the Y-shafts 4 and the sliding bushes 8 in partially immerse this recess. This is a move the X-waves 5 prevented. The spherical bearing is located between the X-shafts 5 15 indicated with the locking screw 17.

According to FIG. 10, the X, Y, Z bearing is completed in such a way that the the X-waves 5 carrying shaft holder 6 are shown. On these X waves 5, the carriage 7 is shown displaceably, which in its interior Articulated bearing 15 not visible, the carriage 7 with the pin 23rd is provided. You can also see the locking screw 17 in the here cover plate 10, not shown, is screwed in. As can be seen from Figure 11, the bearing is now completed in such a way that around the pin 23 of the carriage 7 a wave washer 19 of the spherical plain bearing is placed. Finally in Figure 12 the bearing completed with the cover plate 10 is shown. This points in the center of the through hole 16, in which the locking screw 17th is screwed in.

reference numeral

1

X, Y, Z bearings

2

baseplate

3

Shaft holder for Y-wave

4

Y-shaft

5

X-shaft

6

X-shaft holder

7

Sledge.

8th

Sliding bush on the Y shaft

9

Sliding bush on the X shaft

10

cover plate

11

retaining cap

12

fixing screw

13

support projection

14

Through Hole

15

second spherical plain bearing

16

Through Hole

17

locking screw

18

first spherical bearing

19

wave washer

20

recess

21

mounting hole

22

Long hole

23

spigot

24

X, Z bearings

25

Y, Z bearings

27

head Start

28

counter-projection

a

Shift amount in the X direction

b

Shift amount in the Y direction

Claims (11)

1. Bridge bearing with which a substructure and a superstructure are slideably interconnected, where, in an imaginary three-dimensional system of coordinates, the superstructure can be displaced in at least one of the horizontal directions X, Y and can be tilted about the vertical Z, comprising a baseplate which can be arranged on the substructure and a cover plate which can be arranged on the superstructure, characterized in that it is designed as an X-, Y-, Z-bearing, where the baseplate (2) has four protruding shaft mounts (3) which are spaced apart from one another in the X-direction and in the Y-direction and in which two Y-shafts (4) which are parallel to the Y-direction are held, where a further displaceable shaft mount (6) is arranged on each of the Y-shafts (4), the shaft mounts (6) being interconnected by means of two X-shafts (5) which are parallel to the X-direction, such that a carriage (7) guided on the X- and Y-shafts (5, 6) via slide bushes (9, 8) is able to move linearly in both directions, and in that the carriage (7) has a curved shaft plate (19) which is housed in an associated cavity (20) in the cover plate (10), such that said cover plate is able to tilt about the vertical Z via a first pivot bearing (18).
2. Bridge bearing according to Claim 1, characterized in that the slide bushes (8, 9) are maintenance-free cylindrical slide bushes based on PTFE.
3. Bridge bearing according to Claim 1, characterized in that the Y-shafts (4) are fastened in the shaft mounts (3) by means of retaining caps (11) which are pressed against the shaft mounts (3) from outside by means of a fastening screw (12) arranged in the end faces of the Y-shafts (4).
4. Bridge bearing according to Claim 1, characterized in that the X-shafts (5) have at each of their opposite ends an arcuate bulge into which part of the circumferential surface of the Y-shafts (4) penetrates.
5. Bridge bearing according to Claim 1, characterized in that the baseplate (2) has in its central part a projecting support (13) which protrudes in the direction of the cover plate (10) and is contacted in the loaded state by the underside of the carriage (7).
6. Bridge bearing according to Claim 1, characterized in that the X- and/or the Y-shafts (5, 4) have a deflection in the direction of the cover plate (10).
7. Bridge bearing according to Claim 1, characterized in that the carriage (7) has in its central part a through hole (14) provided with a shoulder and into which is fitted a second pivot bearing (15) which is retained via a securing screw (17) fitted into the cover plate (10), a gap between the securing screw (17) and the through hole (14) being formed in the region of a journal (23) of the carriage (7).
8. Bridge bearing according to Claim 7, characterized in that the first and second pivot bearings (18, 15) have a common sphere centre.
9. Bridge bearing according to Claims 1 and 7, characterized in that the first and second pivot bearings (18, 15) are designed as maintenance-free axial pivot bearings, radial pivot bearings or oblique pivot bearings based on PTFE.
10. Bridge bearing with which a substructure and a superstructure are slideably interconnected, where, in an imaginary three-dimensional system of coordinates, the superstructure can be displaced in at least one of the horizontal directions X, Y and can be tilted about the vertical Z, comprising a baseplate which can be arranged on the substructure and a cover plate which can be arranged on the superstructure, characterized in that it is designed as an X-, Z-bearing, where the baseplate (2) has two protruding shaft mounts (6) which are spaced apart from one another in the X-direction and in which two spaced-apart X-shafts (5) which are parallel to the X-direction are held, on which shafts are arranged slide bushes (9) which are connected to the carriage (7) and can be displaced in the linear direction, and the carriage (7) has a curved shaft plate (19) which is housed in an associated cavity (20) in the cover plate (10), such that said cover plate is able to tilt in the Z-direction.
11. Bridge bearing with which a substructure and a superstructure are slideably interconnected, where, in an imaginary three-dimensional system of coordinates, the superstructure can be displaced in at least one of the horizontal directions X, Y and can be tilted about the vertical Z, comprising a baseplate which can be arranged on the substructure and a cover plate which can be arranged on the superstructure, characterized in that it is designed as a Y-, Z-bearing, where the baseplate (2) has two protruding shaft mounts (3) which are spaced apart from one another in the Y direction and in which two spaced-apart Y-shafts (4) which are parallel to the Y-direction are held, on which shafts are arranged slide bushes (8) which are connected to the carriage (7) and can be displaced in the linear direction, and the carriage (7) has a curved shaft plate (19) which is housed in an associated cavity (20) in the cover plate (10), such that said cover plate is able to tilt in the Z-direction.

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